$ sudo rpm -Fvh grub*.x86_64.rpm
$ sudo grub2-install --force --skip-fs-probe /dev/sda6
Installing for i386-pc platform.
grub2-install: warning: File system ‘xfs’ doesn't support embedding.
grub2-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
Installation finished. No error reported.